ABAP Select data from SAP table CNVC_SCNG_VERS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNVC_SCNG_VERS table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to CNVC_SCNG_VERS. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the CNVC_SCNG_VERS table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_CNVC_SCNG_VERS TYPE STANDARD TABLE OF CNVC_SCNG_VERS,
      WA_CNVC_SCNG_VERS TYPE CNVC_SCNG_VERS,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <CNVC_SCNG_VERS> TYPE CNVC_SCNG_VERS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNVC_SCNG_VERS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNVC_SCNG_VERS
  INTO TABLE IT_CNVC_SCNG_VERS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVC_SCNG_VERS
*  INTO TABLE @DATA(IT_CNVC_SCNG_VERS2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_CNVC_SCNG_VERS INDEX 1 INTO DATA(WA_CNVC_SCNG_VERS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNVC_SCNG_VERS ASSIGNING <CNVC_SCNG_VERS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVC_SCNG_VERS>-MANDT = 1.
<CNVC_SCNG_VERS>-RUNID = 1.
<CNVC_SCNG_VERS>-SID = 1.
<CNVC_SCNG_VERS>-OBJTYP = 1.
<CNVC_SCNG_VERS>-OBJNAM = 1.

ENDLOOP.

LOOP AT IT_CNVC_SCNG_VERS INTO WA_CNVC_SCNG_VERS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVC_SCNG_VERS-CHECKSUM, sy-vline,
  WA_CNVC_SCNG_VERS-VERSION, sy-vline,
  WA_CNVC_SCNG_VERS-DATUM, sy-vline,
  WA_CNVC_SCNG_VERS-ZEIT, sy-vline,
  WA_CNVC_SCNG_VERS-KORRNUM, sy-vline,
  WA_CNVC_SCNG_VERS-AUTHOR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVC_SCNG_VERS you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_CNVC_SCNG_VERS TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_CNVC_SCNG_VERS INTO WA_CNVC_SCNG_VERS.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CNVC_SCNG_VERS_STR, 
MANDT TYPE STRING,
RUNID TYPE STRING,
SID TYPE STRING,
OBJTYP TYPE STRING,
OBJNAM TYPE STRING,
CHECKSUM TYPE STRING,
VERSION TYPE STRING,
DATUM TYPE STRING,
ZEIT TYPE STRING,
KORRNUM TYPE STRING,
AUTHOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVC_SCNG_VERS_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_CNVC_SCNG_VERS_STR-MANDT sy-vline 
WA_CNVC_SCNG_VERS_STR-RUNID sy-vline 
WA_CNVC_SCNG_VERS_STR-SID sy-vline 
WA_CNVC_SCNG_VERS_STR-OBJTYP sy-vline 
WA_CNVC_SCNG_VERS_STR-OBJNAM sy-vline 
WA_CNVC_SCNG_VERS_STR-CHECKSUM sy-vline 
WA_CNVC_SCNG_VERS_STR-VERSION sy-vline 
WA_CNVC_SCNG_VERS_STR-DATUM sy-vline 
WA_CNVC_SCNG_VERS_STR-ZEIT sy-vline 
WA_CNVC_SCNG_VERS_STR-KORRNUM sy-vline 
WA_CNVC_SCNG_VERS_STR-AUTHOR sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.